Yealink SIP-T27G Administrator's Guide

Account Settings
298
Description
It enables or disables the phone to unregister first before re-registering account X after a reboot.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Account > Advanced > Unregister When Reboot
Parameter
account.X.sip_server_type
[1]
<MAC>.cfg
Description
It configures the type of SIP server.
Permitted
Values
0-Default
2-BroadSoft (It works only if “bw.enable" is set to 1 (Enabled))
8-Genesys
10-Genesys Advanced
12-Star2Star
Default
0
Web UI
Account > Advanced > SIP Server Type
Parameter
account.X.gruu.enable
[1]
<MAC>.cfg
Description
It enables or disables the Globally Routable User Agent URI (GRUU) feature.
GRUU provides a unique user-agent identifier to a specific user-agent (UA) instance. It is required in
which the REFER request must be routed to the correct UA instance, for example, a call transfer.
Permitted
Values
0-Disabled
1-Enabled, the phone will add +sip.instance attribute with the public GRUU to the Contact header of
the REGISTER message.
For example:
Contact: <sip:1012@10.2.20.160:5060>;+sip.instance="<urn:uuid:5acd54e8-f197-57e2-aa42-
5f4a5d04367c>"
Default
0
Parameter
sip.reg_surge_prevention
[2]
<y0000000000xx>.cfg
Description
It configures the waiting time (in seconds) for account register after startup.
Permitted
Values
Integer from 0 to 60
Default
0
Web UI
Network > Advanced > Registration Random > Registration Random (0~60s)
Parameter
account.X.subscribe_register
[1]
<MAC>.cfg
Description
It enables or disables the phone to subscribe to the registration state change notifications.
Permitted
Values
0-Disabled
1-Enabled
Default
0
Web UI
Account > Advanced > Subscribe Register
Parameter
phone_setting.disable_account_without_username.enable <y0000000000xx>.cfg

Yealink SIP-T27G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black, Gold
Wall mountable	Yes
Display diagonal	3.66 \
Display resolution	240 x 120 pixels
RJ-9 ports quantity	2
USB 2.0 ports quantity	1
Voice codecs	CNG, G.711, G.722, G.723.1, G.726, G.729, G.729ab, VAD, iLBC
Dual-Tone Multi-Frequency (DTMF) modes	SIP info
Lines quantity	8 lines
Phonebook capacity	1000 entries
Number of VoIP accounts	6
Bluetooth	-
Security algorithms	AES, MD5
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN interface type	Gigabit Ethernet
Volume control	Digital
Operating temperature (T-T)	-10 - 50 °C
Operating relative humidity (H-H)	10 - 95 %
Cables included	LAN (RJ-45)
Number of handles included	1 pc(s)
Harmonized System (HS) code	85171800

Weight and Dimensions

Depth	210 mm
Width	265 mm
Height	170.5 mm